400115312 has 20 divisors (see below), whose sum is σ = 775638600. Its totient is φ = 199950528.

The previous prime is 400115267. The next prime is 400115363. The reversal of 400115312 is 213511004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30314 + ... + 41462.

It is an arithmetic number, because the mean of its divisors is an integer number (38781930).

Almost surely, 2^400115312 is an apocalyptic number.

It is an amenable number.

400115312 is a deficient number, since it is larger than the sum of its proper divisors (375523288).

400115312 is a wasteful number, since it uses less digits than its factorization.

400115312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13400 (or 13394 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 400115312 is about 20002.8825922665. The cubic root of 400115312 is about 736.8770950989.

Adding to 400115312 its reverse (213511004), we get a palindrome (613626316).

The spelling of 400115312 in words is "four hundred million, one hundred fifteen thousand, three hundred twelve".